The fuel demand valve, used in conjunction w/portable fuel systems, is for above deck use only, eliminates pressurized fuel from reaching downstream fuel lines & your engine, and ensures that fuel is provided to the engine on demand rather than as a result of pressure in the tank. Prevents fuel spray when connecting or disconnecting fittings at the engine. Compatible with Ethanol blended fuels. Eliminates potential service and warranty issues related to pressurized fuel lines. Prevents engine flooding due to pressurized fuel lines. No siphon protection.

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